# LlamaFirewall vs Presidio

> Presidio scores 66 (B) on agent readiness against LlamaFirewall's 50.8 (D), and leads in 6 of 7 scored categories. Both do guard pii. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/llamafirewall-vs-microsoft-presidio
- Markdown: https://www.anchorterminal.com/compare/llamafirewall-vs-microsoft-presidio.md (~2,500 tokens)
- Slim: https://www.anchorterminal.com/compare/llamafirewall-vs-microsoft-presidio.min.md (~530 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/llamafirewall-vs-microsoft-presidio.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-09

Presidio scores 66 (B) on agent readiness against LlamaFirewall's 50.8 (D), and leads in 6 of 7 scored categories. Both do guard pii.

- LlamaFirewall: grade D, 50.8/100, rank #682 of 842. Markdown https://www.anchorterminal.com/tools/llamafirewall.md · JSON https://www.anchorterminal.com/api/v1/tools/llamafirewall.json
- Presidio: grade B, 66/100, rank #281 of 842. Markdown https://www.anchorterminal.com/tools/microsoft-presidio.md · JSON https://www.anchorterminal.com/api/v1/tools/microsoft-presidio.json

## Which one, for what

### LlamaFirewall (D)

Good for: A Python agent team that wants injection, hidden-character and generated-code checks in process, is willing to pin dependencies or install from main, and can get the gated weights.

Watch for: No PyPI release since 1.0.3 on 29 May 2025, and no changelog, tags or deprecation notes were found

### Presidio (B)

Good for: Detecting and masking personal data in prompts, outputs, logs and images on the owner's own machines, with detection tuned by entity, threshold and custom recognisers.

Ahead on:
- Reliability, 78 against 53
- Schema & documentation, 69 against 49
- Agent ergonomics, 69 against 60
- Payments & pricing, 60 against 50
- Maintenance & community, 63 against 15
- Transparency & trust, 65 against 58

Watch for: The REST containers have no authentication by design. The FAQ says to put a gateway or proxy in front


## Score by category

| Category | Weight | LlamaFirewall | Presidio | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 53 | 78 | Presidio +25 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 49 | 69 | Presidio +20 |
| Agent ergonomics | 13% (16.2 this run) | 60 | 69 | Presidio +9 |
| Security & auth | 14% (17.5 this run) | 56 | 53 | LlamaFirewall +3 |
| Payments & pricing | 10% (12.5 this run) | 50 | 60 | Presidio +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 15 | 63 | Presidio +48 |
| Transparency & trust | 7% (8.8 this run) | 58 | 65 | Presidio +7 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **50.8 · D** | **66 · B** | |

## Facts side by side

| Fact | LlamaFirewall | Presidio |
| --- | --- | --- |
| Kind | Agent framework | SDK + MCP |
| Vendor | Meta | Data Privacy Stack |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  | HTTP |
| Auth | None | None |
| Pricing | Free | Free |
| x402 | no | no |
| Licence | MIT (library). The Prompt Guard 2 weights it downloads are under the Llama 4 Community Licence | MIT |
| Read-only variant documented | no | no |
| llms.txt | no | no |
| Last release | 2025-05-29 | 2026-07-22 |
| Terms last updated | no document linked | no document linked |
| Privacy policy last updated | no document linked | no document linked |
| Customer content may train models |  |  |
| Terms restrict automated access |  |  |
| Terms restrict benchmarking |  |  |
| Terms or service can change without notice |  |  |
| Arbitration or class-action waiver |  |  |
| Popularity | 4.4k stars, 1k PyPI/wk | 11k stars, 1.2M PyPI/wk |

## Verdicts

**LlamaFirewall.** One `scan()` call runs several checks on the owner's machine and returns a short typed result. The last PyPI release is 1.0.3 from 29 May 2025, and its Prompt Guard loader imports a `huggingface_hub` class that current versions no longer export, so a fresh install needs older pins. The classifier weights also need Meta's manual approval.

**Presidio.** MIT-licensed personal data detector with a public OpenAPI document, tests on Python 3.10 to 3.14 and about 1.2 million weekly PyPI downloads. The REST containers have no authentication, the project states no SLA or support, and it covers personal data only, with no prompt injection or content moderation checks.

## Before you call either

### LlamaFirewall

1. Pin `huggingface_hub` below 1.0 and a matching `transformers` 4.x before importing the Prompt Guard scanner from the 1.0.3 wheel, or install from main
2. Get access to `meta-llama/Llama-Prompt-Guard-2-86M` and set a Hugging Face token first. Without one the loader prompts for a login and a headless run stalls
3. Call `scan_async` inside a running event loop. `scan()` wraps `asyncio.run` and fails there. `scan_async` returns score 0.0 and reason `default` on every allow
4. Split text longer than 512 tokens yourself before a Prompt Guard scan. The library truncates and does not chunk
5. Do not feed a block `reason` back to the model. The Prompt Guard reason quotes the full scanned text, and the hidden ASCII reason decodes the hidden payload

### Presidio

1. Install from PyPI or pull images from ghcr.io/data-privacy-stack. The mcr.microsoft.com/presidio-* images are no longer updated
2. Download a spaCy model (python -m spacy download en_core_web_lg) before the first `AnalyzerEngine()` call, or use the Docker image
3. Send both text and language to `/analyze`. A request missing either returns HTTP 500 with a JSON error field
4. Pass entities and score_threshold to limit results. Many country-specific recognisers are disabled by default and need enabling in the registry YAML
5. Keep the containers on a private network or behind your own authenticating proxy. They accept any caller

## Questions

### Which is better for AI agents, LlamaFirewall or Presidio?

Presidio scores 66 (B) on agent readiness against LlamaFirewall's 50.8 (D), and leads in 6 of 7 scored categories.

### Are LlamaFirewall and Presidio open source?

Yes. LlamaFirewall is open source (MIT (library). The Prompt Guard 2 weights it downloads are under the Llama 4 Community Licence). Presidio is open source (MIT).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/llamafirewall-vs-microsoft-presidio.json, and with the fewest tokens: https://www.anchorterminal.com/compare/llamafirewall-vs-microsoft-presidio.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "llamafirewall", "b": "microsoft-presidio"}`. From a terminal: `anchor compare llamafirewall microsoft-presidio`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/llamafirewall.json and https://www.anchorterminal.com/api/v1/tools/microsoft-presidio.json

## Other comparisons with LlamaFirewall or Presidio

- [Amazon Bedrock Guardrails vs LlamaFirewall](https://www.anchorterminal.com/compare/amazon-bedrock-guardrails-vs-llamafirewall.md)
- [Azure AI Content Safety (Prompt Shields) vs LlamaFirewall](https://www.anchorterminal.com/compare/azure-ai-content-safety-vs-llamafirewall.md)
- [Cisco AI Defense Inspection API vs LlamaFirewall](https://www.anchorterminal.com/compare/cisco-ai-defense-inspection-vs-llamafirewall.md)
- [Google Cloud Model Armor vs LlamaFirewall](https://www.anchorterminal.com/compare/google-model-armor-vs-llamafirewall.md)
- [Granite Guardian vs LlamaFirewall](https://www.anchorterminal.com/compare/granite-guardian-vs-llamafirewall.md)
- [Guardrails AI vs LlamaFirewall](https://www.anchorterminal.com/compare/guardrails-ai-vs-llamafirewall.md)
- [Lakera Guard (Check Point AI Guardrails) vs LlamaFirewall](https://www.anchorterminal.com/compare/lakera-guard-vs-llamafirewall.md)
- [LlamaFirewall vs NVIDIA NeMo Guardrails](https://www.anchorterminal.com/compare/llamafirewall-vs-nemo-guardrails.md)
- [LlamaFirewall vs OpenAI Guardrails](https://www.anchorterminal.com/compare/llamafirewall-vs-openai-guardrails.md)
- [LlamaFirewall vs Prisma AIRS AI Runtime Security API](https://www.anchorterminal.com/compare/llamafirewall-vs-prisma-airs.md)
- [Amazon Bedrock Guardrails vs Presidio](https://www.anchorterminal.com/compare/amazon-bedrock-guardrails-vs-microsoft-presidio.md)
- [Cisco AI Defense Inspection API vs Presidio](https://www.anchorterminal.com/compare/cisco-ai-defense-inspection-vs-microsoft-presidio.md)
- [Google Cloud Model Armor vs Presidio](https://www.anchorterminal.com/compare/google-model-armor-vs-microsoft-presidio.md)
- [Guardrails AI vs Presidio](https://www.anchorterminal.com/compare/guardrails-ai-vs-microsoft-presidio.md)
- [Lakera Guard (Check Point AI Guardrails) vs Presidio](https://www.anchorterminal.com/compare/lakera-guard-vs-microsoft-presidio.md)
- [LlamaFirewall vs Mistral Moderation API](https://www.anchorterminal.com/compare/llamafirewall-vs-mistral-moderation.md)
- [Presidio vs Mistral Moderation API](https://www.anchorterminal.com/compare/microsoft-presidio-vs-mistral-moderation.md)
- [Presidio vs NVIDIA NeMo Guardrails](https://www.anchorterminal.com/compare/microsoft-presidio-vs-nemo-guardrails.md)
- [Presidio vs OpenAI Guardrails](https://www.anchorterminal.com/compare/microsoft-presidio-vs-openai-guardrails.md)
- [Presidio vs Prisma AIRS AI Runtime Security API](https://www.anchorterminal.com/compare/microsoft-presidio-vs-prisma-airs.md)
- [Granite Guardian vs Presidio](https://www.anchorterminal.com/compare/granite-guardian-vs-microsoft-presidio.md)
- [Llama Guard 4 vs Presidio](https://www.anchorterminal.com/compare/llama-guard-vs-microsoft-presidio.md)
- [Llama Guard 4 vs LlamaFirewall](https://www.anchorterminal.com/compare/llama-guard-vs-llamafirewall.md)